Improvement in flour-bolts



L. v. RATHBU' N.

' Hour-Bolts. No. 158,520, Patented lan.5,l875.

UNITED STATES PATENT OFFICE.

LEWIS V. RATHBUN, OF EAST PEMBROKE, NEWV YORK.

IMPROVEMENT IN FLOUR-BOLTS.

Specification forming part of Letters Patent No. 158,520, dated January 5, 1875; application filed May 26, 1874.

To all whom it may concern:

a full, clear, and exact description of the construction and operation of the same.

In bolting or screening flour much difficulty is experienced from the clogging of the meshes of the bolting-cloth. The object of my improvement is to remedy this difficulty; and my invention consists in combining with the bolting-reel a whippingcord and spring device for operating it, located within the reel, and acting against the inside of the cloth, by which means the meshes are kept clear from clogging, as hereinafter described. It also consists in the arrangement of the spring devices, as will be more fully explained.

In the drawings, Figure 1 is a central vertical section ofa bolting-reel, showing my improvement. Fig. 2 is a cross-section of the same, on an enlarged scale. Fig. 3 is a section of one of the spring-bolts for operating the whippers.

A represents the ordinary boltingreel of a flouring-mill. B is the central shaft, 0 Care the arms, and D D are the ribs. E is the bolting cloth or screen arranged in the usualmanner. G G are the whipping-cords, of which one or more may be used with each side of the bolting cloth or screen. They are attached at one end of the cloth or screen, directly in contact with the cloth, as shown at a a. At the opposite end they are connected with spring devices H H, so arranged as to intermittently release and snap the cords against the cloth, so as to clear the meshes of the same by concussion. These spring devices consists of bolts b 1), playing endwise in cases 0 c, which are attached to the liningstrips d d at the end of the reel. The bolts are surrounded by spiral springs f f, which rest against shoulders h h of the bolts at one end, and against plates g g inserted against the cases at the other end. The springs throw the bolts outward, thereby straightening the cords, which are attached-to offsets z t of the bolts, to bring them close under the cloth. The bolts are prevented from turning by means of feathered edges or other suitable devices on the bolts.

The outer ends of the bolts are made inclined, as shown at k, and when they arrive at the top, by the motion of the reel, these inclined ends strike a wedge-shaped cam, l, which is stationary, thereby depressing the bolts and loosening the cords, as shown at the top in Fig. 1. y I

As soon as the bolts have passed the cam the sudden reaction straightens the cords and snaps them against the cloth, as before described.

' The apparatus above described is very effective for clearing the meshes of the bolt cloth or screen, as the sharp concussion of the cords will remove all the particles.

, In this device it will be noticed that the whipping-cords are located within the reel thereon, has a tendency to discharge or force back such fibrous matter into the reel again, instead of allowing it to sift through with the flour. In this respect it is much more effective than whipping-cords outside the cloth, which have the opposite tendency of forcing the bran and scales more deeply into the meshes.

By employing the cords inside the reel, the apparatus is also rendered more compact, and is more simple and effective in. operation. The periphery of the reel being in squares, the cords can be distributed over the squares and be made to operate effectively over the whole surface, which cannot well be done where the cords are outside and not connected to the reel.

I do not claim, broadly, whipping-cords com bined with a reel, as I am aware that such have been applied outside the reel 5 but I claim- 1. In a bolting-reel for flouring-mills, the whipping-cord Gr, located within the reel and directly beneath the cloth, the spring H, to which the end of the cord is attached, and

the cam 1; against which the spring acts, the In witness whereof I have hereunto signed whole combined as described, to produce the my name in the presence of two subscribing whipping action on the inner surface of the witnesses.

cloth, as and for the purpose specified. LEWIS V. RATHBUN.

2. The bolt 1), spring f, offset 1', and inclined Witnesses:

end It, in combination with the cords G and GEORGE W. RATHBUN,

cam l, as and for the purpose specified. FRANCIS G. DENTON. 

